diff --git a/primitive-types/Cargo.toml b/primitive-types/Cargo.toml
index 70c88283d..d4488cc56 100644
--- a/primitive-types/Cargo.toml
+++ b/primitive-types/Cargo.toml
@@ -10,7 +10,7 @@ description = "Primitive types shared by Ethereum and Substrate"
 fixed-hash = { version = "0.4", path = "../fixed-hash", default-features = false }
 uint = { version = "0.8", path = "../uint", default-features = false }
 impl-serde = { version = "0.2", path = "impls/serde", default-features = false, optional = true }
-impl-codec = { version = "0.2", path = "impls/codec", default-features = false, optional = true }
+impl-codec = { version = "0.3", path = "impls/codec", default-features = false, optional = true }
 impl-rlp = { version = "0.2", path = "impls/rlp", default-features = false, optional = true }
 
 [features]
diff --git a/primitive-types/impls/codec/Cargo.toml b/primitive-types/impls/codec/Cargo.toml
index d67a3178f..3632450e5 100644
--- a/primitive-types/impls/codec/Cargo.toml
+++ b/primitive-types/impls/codec/Cargo.toml
@@ -1,13 +1,13 @@
 [package]
 name = "impl-codec"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 license = "Apache-2.0/MIT"
 homepage = "https://github.com/paritytech/parity-common"
 description = "Parity Codec serialization support for uint and fixed hash."
 
 [dependencies]
-parity-codec = { version = "3.0", default-features = false }
+parity-codec = { version = "4.0", default-features = false }
 
 [features]
 default = ["std"]